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MW e h S P t e e h S 2 N E R D MM A LL M 0 M d 0 M m "TV Mu llllllllll lllllllllllllllllllllllllii" Feb. 22, 1898.

(No Model.) 2 Sheets-Sheet 2.

0. M. LUNGREN.

LAMP.

No. 599,528. Patented Feb. 22,1898.

avwamff'oz Wes Mi m Wiimeooao THE Numus llivrrnn S'rarns CHARLES M. LUNGREN, OF BAYONNE, NEW JERSEY, ASSIGNOR TO THE SAFETY OAR HEATING AND LIGHTING COMPANY, OF NEW" YORK, N. Y.

LAM P.

SPECIFICATION forming part of Letters Patent No. 599,528, dated February 22, 1898.

Application filed December 3, 1396. Serial No. 614,285. (No model.)

T at whom it may concern:

Be it known that 1, CHARLES M. LUNGREN, of Bayonne, in the county of Hudson, State of New Jersey, have invented certain new and useful Improvements in Lamps, of which the following is a complete specification, reference being had to the accompanying drawings.

The object of my invention is to produce certain improvements in lamps of the inverted regenerative Argand-burner type, whereby the general efficiency of the lamp is improved and whereby, more especially, provision is made for the transmission of a portion of the light up through the body of the lamp.

Bodies of lamps of the class to which my invention belongs have been heretofore constructed of opaque material, by which in use the area of radiation of light from the flame of the lamp is circumscribed by the body part thereof, so that directly above the lamp there is an area of dark shadow.

The features of my invention not specially referred to in the foregoing general statement will be hereinafter distinctly pointed out in detail in the specification and succinctly defined in the claims.

In the accompanying drawings, Figure I is a side View of my lamp, one-half being shown in elevation and one-half in vertical central section. Fig. II is a section on the line II II of Fig. I.

Referring to the figures on the drawings, 1 indicates a main supporting metallic framepiece, illustrated as of the usual annular shape. It sustains upon its upper side the legs 2 and 3 of an open or spider frame. To its lower edge, as by a suitable hinge 4:, is movably secured in the ordinary manner a ring 5, which is adapted in practice to be sustained upon the side opposite its hinge against the edge of the frame 1, as by any ordinary latching mechanism. (Not illustrated.)

The ring 5 carries a pendent transparent or glass globe 6, having an upper everted edge 7, that rests upon a fillet 8, supported on an inturned flange 9 of the ring 5.

The frame-piece 1 is designed to be supported in the usual manner by pendent bracketarms (not illustrated) and is for that purpose provided with externally-opening apertures 10 and 11, such as are usually employed for the purpose. One of such apertures-as, for exam ple,the one numbered 10- is designed to receive a tubular bracket-support which affords communication with a source of gas-supply.

My lamp being adapted to be employed in connection with usual lighting appliances, it is of course equally unnecessary to illustrate the ordinary pendent brackets and a source of gas-supply.

The legs 2 and 3 of the spider-frame sustain a head-piece 12, that is provided with a tubular pendent piece 13. The bore of the pendent piece 13 is prolonged in a direction at right angles to it into a duct 14, which by means of a pipe 15 makes communication with the aperture 10 in the frame-piece 1, the pipe 15 screwing at one end into the internally-screw-threaded end of the duct 14 and at the other into a screw-threaded end of a tubular channel 16, formed in the frame-piece 1 and communicating with the aperture 10.

The pendent piece 13 carries uponits screwthreaded end 17 a gas-chamber 18,whose lower end is internally threaded to receive a screwthreaded plug or disk 19, which forms with it an air-tight joint, but which is pierced with an annular series of apertures, into each of which is fitted a burner-tube 20. The burner-tubes are separated one from another by a narrow space. Their lower ends are united by a ring 21, into which, respectively, they are fitted in a manner corresponding to that in which they are fitted to the plug 19.

The arrangement of the series of burnertubes in cylindrical shape is not new in the art, but is illustrated as affording suitable means for producing the well-known inverted flame illustrated at 22 in the drawings.

The plug 19 carries secured concentrically within it at one end a pendent rod 23, the lower end 24 of which is screw-threaded to support in an adjustable manner a perforate or foraminous spreader 25. This spreader is cup-shaped and its diameter is such as to enable it to fit snugly but movably within the ring 21. The end 24 of the rod 23 screws into the bottom of the cup-shaped spreader, while the open end of the cup is introduced into the ring 21. By means of the screw-threads upon the end 24 of the rod 23 the spreader 25 may be raised or lowered for the purpose of regulating the shape of the flame 22.

The head 12 of the spider-frame is provided with an internally-screw-threaded tubular stud 26, into which is screwed a post 27, which carries upon its upper screw-threaded end a cap-piece 28, provided with apertures 29. A depending flange upon the cap-piece 28 is externally screw-threaded to accommodate a correspondingly-screw-threaded sheet-metal ring 31, that serves to support an air-flue 32. The flue 32, by means of the screw-threads that unite the flange 30 and the ring 31, is adjustable to and from the head-piece 12, so as to increase or diminish the space between the partswhich establish communication at that point between the burner and the outside atmosphere, the flue 32 being provided for the purpose of air-supply with air-openings 33.

Upon the flue 32 is secured, as by means of an annular piece 34, a coronal 35, which is designed to afford an ornamental finish for the top of the lamp (and which for that reason may be of any suitable contour and configuration) and also to sustain a transparent or glass dome 36. The dome is designed to surround the upper body part of the lamp and, while protecting the burner from injurious drafts of air, to afford means of illumination through the open body part or spider-frame already described. As a protective covering it depends toward the frame-piece 1, but preferably provides an air-inlet 37 between the entire circumference of its lower edge and the frame-piece. The dome is adjustable, as by means of the screw-threads, upon the parts 30 and 31 above described, so that the size of the air-inlet 37 may be increased or diminished at will.

A chimney 38 surmounts the flue 32 and I affords the usual means of egress of products of combustion from the lamp.

Within the air-flue 32 I provide a smokeflue 39, which is supported upon the headpiece 12 and receives through the apertures therein the products of combustion from the burner. The products of combustion are directed toward the flue 39 by a transparent chimney 40. This chimney may be constructed of suitable transparent material adapted to resist the action of heat-as, for example, micaand, as illustrated, is provided at its opposite end with reinforcing metal beads 41. It is preferably truncately conical in shape and is supported at its lower end bya somewhat curved but generally horizontally-disposed partition plate 42. The plate 42 performs a Variety of functions and is preferably made of metal secured by suitable means to the frame-piece 1. It performs the function of a reflector, and is therefore provided with a polished lower surface. It affords means for the admission of air from the upper part of the lamp to the interior of the bowl upon one side thereof. It is for that reason provided with an inclined zone 43, which unites one horizontally-disposed portion of it to the other and serves to define an annular chamber 44 between it and the ring 5 for the reception of air designed for the burner. The annular chamber 44, defined in the manner described, is adapted to discharge drafts of air downwardly into the bowl 6 and not otherwise.

Communication between the space above the partition-plate 42 and the chamber 44 is afforded through apertures 45, located in an annular series adjoining the outer edge of the plate 42. The plate 42 serves also, as above described, to support the transparent chimney 40.

The chamber 18 is provided at its upper part with an annular offset 46, to which is secured by any suitable means a cylindrical wall, or sleeve, it may be called, 47, that projects downwardly toward the burner-tubes 20, surrounding their upper portions and defining around them and around the lower part of the chamber 18 an air-space. This sleeve is provided with radial flues 48, that are preferably made integral with it and which, communicating through apertures 49 in the side walls of the chimney 40 with the air-space above the plate 42, serve to supply air to the interior of the sleeve. The radial flues 48 may be close-jointed with the apertures 49 in the chimney 40 and serve to completely separate the air in the space above the plate 42 from the products of combustion that ascend through the chimney 40 around the flue 48.

To the lower end of the sleeve 47 is secured, as by means of a bayonet-joint 50, a terminal cylinder51, which supports, as upon a flange 52 upon its lower edge, a cylindrical reflector 53. The upper part 54 of the cylinder 51 is of slightly smaller diameter than the lower part to admit the insertion between it and the reflector 53 of the lower edge of the sleeve 47.

The cylindrical reflector 53 is of such relative width as to cause it to extend somewhat within the chimney 40, so that it will reflect rays of light into the space defined by the chimney 40 as well as into the space defined by the bowl 6.

In operation, gas being admitted through the tube 15, the duct 14, and the bore of the piece 13 into the interior of the chamber 18, it passes through the tubes 20 and is ignited at their lower ends. Combustion is supported and the flame is formed in the shape illus trated in the drawings by the currents of air supplied to the flame in the manner immediately hereinafter described. Air is admitted through the apertures 33 or through the inlet 3'7, or through both, to the interior of that space in the body part of the lamp bounded by the flue 32, the dome 36, the plate 42, and the chimney 40, together with those elements by which they are supported and assembled.

Confined within the space above described the air finds entrance to the burner partially through the apertures 45 of the plate 42 and partially through the radial fines 48. The air passing through the apertures 45 is admitted to the interior of the bowl 86, passing against the inner surface thereof toward the lower part of the bowl, in the first instance. The air admitted through the fines 48 is introduced into the interior of the sleeve 47 and its extension 51 and also through the ranks of tubes 20 into the interior of the spreader 25. By means of the air that is discharged upon opposite sides of the flame from the end of the cylinder 51, 011 the one hand, and the spreader 25, on the other, the proper formation is imparted to the flame. The formation of the flame is likewise assisted and combustion is supported by the air which enters from the chamber As soon as the lamp is lighted and the flame has taken direction a current of air carrying the heated products of combustion is caused to ascend through the chi1nney 4E0 around the radial fines 4:8 and is discharged through the smoke flue 39. The heat from the flame is thus exerted against the lower surface of the horizontally-disposed plate 42 and the inner walls of the thin chimner 40 of the s1noke-fiue 39. The air that is afterward admitted to the burner is confined by the dome 36 against the respective surfaces of those several elements and is by contact therewith heated to a high degree before it is admitted to the burner in the manner previously described. Consequently the steadiness of the flame and the efficiency of the lamp as a means of producing intense, regular, and uniform illumination are materially increased. The current generated by the heat of the flame that ascends through the chimney 4C0 draws upon the volume of air confined within the bowl 6, which, passing out, compels the influx of fresh air to support combustion in the manner already described. Light from the flame 22 is radiateddownwardly and upwardly throughout a space below about thirty degrees above a horizontal plane through the flame, but a portion of the light is radiated upwardly through the transparent wall of the chimney 1-0, the open spider-frame, and the dome 36 sufficiently to produce a radiance overhead above the body of the lamp.

What I claim is- 1. In a lamp of the inverted-burner type, the combination with the burner, and openwork frame, of a transparent inclosing element, a partition dividing the same horizontally, a sleeve surrounding the burner, and defining an air-space around the same, a transparent chimney adapted to convey away the products of combustion from the burner, air-passages establishing communication between the interior of the sleeve and the eX- terior of the chimney, and a reflector surrounding the lower end of the sleeve above the lower end of the burner, and extending above and below the lower end of the chimney, whereby it is adapted to reflect light upwardly and downwardly, substantially as set forth.

2. In a lamp of the inverted regenerative Argand-burner type, the combination with a frame, burner, bowl, and dome, of a wall dividing the space between the dome and bowl into two parts, said wall including a smokeflue, a head-piece 12 extending outside of the smoke-flue, and a vertically-adjustable airtime surrounding the smoke-flue above the frame, the end of the air-flue being arranged opposite to the said head-piece, whereby the air-space between the end of the fine and the head-piece may be varied by adjusting the position of the air-flue, substantially as set forth.

3. In a lamp of the inverted regenerative Argandburner type, the combination with a frame, burner, and bowl, of a wall defining a passage for the products of combustion from the bowl above the burner, a dome defining an air-space on the outside of said wall, means of communication between said air-space and the burn er, and means for adjusting the dome to and from the frame for the purpose of regulating the size of the air-inlet between those elements, substantially as set forth.

In testimony of all which I have hereunto subscribed my name.

CHARLES M. LUNGREN.

Viitnesses:

HUGH Rose, R. M. DIXON. 

